/* nav组件样式 */
.nav {
    display:flex;
    flex-wrap:wrap;
    width:100%;
    padding-top:20.5px;
}
.nav-item {
    width:25%;
    margin-bottom:20.5px;
}
.nav-link {
    display:flex;
    justify-content:center;
    align-items:center;
    flex-direction:column;
    color:#999;
    font-size:12px;
}
.nav-img {
    width:46.933333%;
    margin-bottom:5.5px;
}